The invention discloses a zirconia based complex phase ceramic and the manufacture method that belongs to zirconia based structure ceramic field. It contains 2-3mol% Y2O3, 50-65%mol% Y-TZP and 35-50mol% alpha-Al2 O3, and sintering assistant agent MgO 0.6-1.0wt% and SiO2 0.6-2.5wt%. The process includes the following steps: mixing zirconia powder that contains Y2O3 with alpha-Al2 O3, MgO powder, and SiO2, adding 55-70wt% water, and 1-2wt% ammonium polyacrylate dispersant, taking ball milling, spraying and graining, molding from powder under 150-200MPa, sintering in 1450-1480 degree centigrade to gain the material. The advantages of the invention are that it has simple process, low cost, and has high percent of qualification.

Zirconium oxide base complex phase ceramic and preparation process thereof

The invention discloses an application of kaempferol in medicines for inhibiting rejection reaction of a receptor on organ transplantation. The invention discloses pharmacological effects of kaempferol in inhibiting rejection reaction of organ transplantation in the body of a receptor for the first time; and moreover, optimal effects can be achieved when kaempferol is combined with low-dose cyclosporin for a short time, and long-term survival of an islet graft in the receptor can be induced, so that various side effects caused by using full-dose cyclosporin for a long time can be avoided, the economic burden of patients brought by long-term anti-rejection treatment can also be lightened, and the long-term high-quality life of organ transplantation patients can be further facilitated. The invention also discovers an immune adjustment action mechanism of kaempferol, namely that kaempferol can be used for significantly increasing the number of regulatory T lymphocytes in the body of the receptor and reducing the gene expression of an islet graft IL-6 in the body of the receptor, so that the effects of resisting inflammation and resisting rejection reaction can be achieved.

Application of kaempferol in medicines for inhibiting rejection reaction of receptor on organ transplantation

Preparation method of 3mol percent yttria stabilized tetragonal phase zirconia polycrystalline (3Y-TZP) for teeth

The invention relates to a zirconium based high temperature resistant composite ceramic coating preparation method including modified fluoro silicone solvent preparation, paint powder preparation and preparation of a zirconium based high temperature resistant composite ceramic coating by mixing of the modified fluoro silicone solvent and the paint powder. The beneficial effects of the zirconium based high temperature resistant composite ceramic coating preparation method are that: the process is simple, the prepared zirconium based high temperature resistant composite ceramic coating can form a dense nano ceramic glaze layer, has good impact resistance and wear resistance, can be used for a long term in high temperature environment below 1350 DEG C, and has the characteristics of high temperature resistance, good acid and alkali corrosion resistance, long one-time spraying and use cycle, no pollution to environment, and the like. The composite ceramic paint can be resistant to general acid and alkaline etching, waterproof and moistureproof, can prevent organic compound corrosion, and has excellent protection effect on parts working in high temperature environment, acid and alkali environment and other perishable environment.

Zirconium based high temperature resistant composite ceramic coating preparation method

The invention relates to the technical field of shaver cutters and in particular to a ceramic shaver cutter. The ceramic shaver cutter comprises a circular ring piece, an inner ring blade set, an outer ring blade set and a blade base. The inner ring blade set and the outer ring blade set are each composed of at least one blade. The inner side of the bottom of each blade of the outer ring blade set is connected with the outer ring wall of the circular ring piece. The outer side of the bottom of the each blade of the inner ring blade set is connected with the inner ring wall of the circular ring piece. The inner side of the bottom of each blade of the inner ring blade set is connected with the blade base. The top end of each blade is provided with a blade point and each blade is made of a ceramic material. According to the shaver cutter, the structure is improved, the double-ring blades are reinforced through the circular ring piece, the problem that a shaver is not resistant to impact when a ceramic blade serves as a cutter is solved, meanwhile the traditional double-ring blades are maintained, and industrial production is further facilitated; and by the adoption of a shaver adopting the ceramic cutter, it is tested that the a cutter bit is still free of fragments or cracks when the shaver freely falls off 100 times at the height of 1.5 m.

Ceramic shaver cutter

In the invention, aluminium hydroxide is covered on surface of nanometre zirconium oxide powder (contaiing 4.37-6.04 percent of yittrium oxide, zirconium oxide and aluminium oxide compound micropowder that content of tetragonal zirconium oxide is 70-90 percentage of total quantity of zirconium oxide. Said compound micropowder, propenamide, (ross-linking agent and dispersing agent are used as raw material to be produced to green bodies by injection forming, then to be fired in regular pressure condition to said invention ceramics with strength 700-1000 MPa, toughness 15-17 Mpa.m1/2.

Qiu Tai

Papers

Zirconia based ceramics in high intensity and toughness, and preparation method thereof